201990693 has 8 divisors (see below), whose sum is σ = 269394400. Its totient is φ = 134623728.

The previous prime is 201990683. The next prime is 201990697. The reversal of 201990693 is 396099102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201990693 - 2⁵ = 201990661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201990697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8523 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (33674300).

Almost surely, 2^201990693 is an apocalyptic number.

It is an amenable number.

201990693 is a deficient number, since it is larger than the sum of its proper divisors (67403707).

201990693 is a wasteful number, since it uses less digits than its factorization.

201990693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18371.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 201990693 is about 14212.3429806630. The cubic root of 201990693 is about 586.7374194038.

The spelling of 201990693 in words is "two hundred one million, nine hundred ninety thousand, six hundred ninety-three".